Hi,
Welcome to the ehealthforum. I am glad to help you out. The common causes of the bleeding after intercourse are injuries to the vaginal wall during intercourse, infections (like gonorrhoea, chlamydia, yeast infections) can be a cause of vaginal bleeding after intercourse, lowered estrogen levels in peri-menopausal or postmenopausal women may cause the lining of the vagina to become thinned and easily inflamed or infected, and these changes can be associated with vaginal bleeding after intercourse & anatomical lesions, such as tumors or polyps on the cervix or vaginal wall may lead to vaginal bleeding during or after intercourse.
The bleeding doesnât seem to be related to the hysterectomy done 4 months ago. Please do consult a gynaecologist for the same as it is not possible to make an online diagnosis. I sincerely hope this information helps. Take care.